Translation and Proteins

Question 1

T/F The basic mechanism of protein synthesis is the same in all cells

Answer 1

True

Question 2

Name three characteristics of the genetic code.

Answer 2

The code is specific, each codon always codes for the same amino acid

The code is with a few exceptions universal

The code is degenerate. Though each codon corresponds to a single amino acid, an amino acid may have more than one triplet coding for it

Question 3

What is an anti codon and why is it useful?

Answer 3

An anticodon is a specific sequence of nucleotides on a (tRNA). The primary function is to complement and recognize a specific codon on mRNA during the process of protein synthesis.

Question 4

In tRNA charging, Attachment of amino acids to specific tRNAs is carried out

Answer 4

aminoacyl tRNA synthetases

Question 5

Name the 3 sites of the ribosome

Answer 5

EPA sites

Question 6

What happens in the A site?

Answer 6

Accepts incoming charged tRNA with the complementary anticodon to the mRNA codon.

Question 7

What happens in the P site?

Answer 7

Holds the tRNA carrying the growing polypeptide chain.

Question 8

What happens in the E site?

Answer 8

The Exit site: Releases the empty tRNA after its amino acid is transferred to the growing chain.

Question 9

What are the 3 stages of translation?

Answer 9

Initiation, Elongation and Termination

Question 10

There are _____codons for ________amino acids

Answer 10

64 possible codons for 20 amino acids.

Question 11

What holds amino acids in the primary structure together?

Answer 11

Peptide bonds